Myth:

　　42

　　.

　　“Real fat is not bad for us,” says Harcombe. It’s man-made fats that we should be demonizing. Why do we have this idea that meat is full of saturated fat? In a 100g pork chop, there is 2.3g of unsaturated fat and 1.5g of saturated fat.

　　Myth: We should eat more fibre.

　　For three decades, we have eaten fibre into our bodies to help us feel full and keep our digestive systems moving.

　　43

　　, says Harcombe. The advice to eat more fibre is put forward along with the theory that we need to clean our digestive systems. But essential minerals are absorbed from food while it is in the intestines(肠道), so why do we want to wash everything out? Concentrate on not putting bad food in.

　　Myth: You need to eat five portions of fruit and vegetables a day. “Five-a-day is the most well-known piece of nutritional advice,” says Harcombe. “You’d think it was based on firm evidence of health benefit.

　　44

　　.” Five-a-day started as a marketing campaign by 25 fruit and vegetable companies and the American National Cancer Institute in 1991. There was no evidence for any cancer benefit.

　　Myth: Fruit and vegetables are the most nutritious things to eat.

　　Apparently not. Harcombe allows that vegetables are a great addition to the diet—if served in butter to deliver the fat-soluble(dissolved) vitamins they contain—but natural sugar in fruit, goes straight to the liver and is stored as fat.

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